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Rendering Methods ¶
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The LOPs viewport can be set to interactively render with Karma, or any available render delegate. |
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Stand-alone USD viewer, which is a standard part of the USD library. |
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Pane for interactive and background rendering, with network snapshots included. |
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Writes out temporary USD files, and renders them with |
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Streamlined rendering of USD scenes with PDG. |
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Command-line rendering utility. |
USD Render ROP
USD Render Scene TOPStats ¶
Karma and husk provide useful statistics for inspecting renders. A sub-set of the stats can be visible interactively in the Render Gallery. However a comprehensive report can be generated using the renderstatsreport commandline utility.
Tip
For best results, adding the “Optimization AOVs” Quick Setup can provide more data to the report.
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Overview of stats available to Karma and Solaris |
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Generate image with baked-in stats. |
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Produce a self-contained HTML report from an image’s stats. |
Logs ¶
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Add the Log Viewer pane to your desktop, if it’s not already present in your Houdini session, to inspect render output.
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Karma defaults to a verbosity level 3, which provides a good balance of info, without becoming overwhelming or impacting performance.
Misc ¶
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The only way to “freeze” Karma’s random number generator (RNG) is to add the commandline argument
--lock-random 1 -
Karma supports cryptomatte; see the
Karma Cryptomatte helpcard for more details. -
When USD 23.11 was released, a new guide for rendering was included: https://openusd.org/release/user_guides/render_user_guide.html. This is a valuable resource, but keep in mind it may refer to features that do not apply to Houdini 20.0 or earlier.